The RD-108 is a rocket engine developed in the Soviet Union, primarily used in the Vostok launch vehicle. It operates on a combination of kerosene and liquid oxygen as propellants, providing a thrust of approximately 100 kilonewtons. This engine is notable for its reliability and efficiency, contributing to the success of early human spaceflight missions. Designed in the 1950s, the RD-108 features a unique four-chamber configuration, allowing it to produce significant power while maintaining a compact size. Its design has influenced various other engines and remains a key part of the history of space exploration.